\documentclass[tikz]{standalone}
%\usepackage{tikz}

\begin{document}
\begin{tikzpicture}[circuit ee IEC, set resistor graphic=var resistor IEC graphic] 

  \pgfmathsetmacro{\shift}{4}

\foreach \contact/\y in {1/\shift,2/2*\shift,3/3*\shift}
{
\node [contact] (down contact \contact) at (\y,0) {};
\node [contact] (up contact \contact) at (\y,\shift) {};
}

\node [contact] (down contact 4) at (4*\shift,0) {};
\node [contact] (down contact 5) at (5*\shift,0) {};
\node [contact] (ground contact) at (10,\shift) {};

\node (e_text) at (2*\shift,\shift+1.5){Extracellular};
\node (e_text) at (2*\shift,-1.5){Intracellular};

\node (e)[circle, draw, fill=white, inner sep = 2pt] at (2*\shift,-1) {};
\draw {(down contact 2)-- (e)};

\node (i)[circle, draw, fill=white, inner sep = 2pt] at (2*\shift,\shift+1) {};
\draw {(up contact 2)-- (i)};

%V
\node (v) at (-2, 0.5*\shift) {$V_1$};
\draw [triangle 45-]{(-2,-1) -- ++(up:0.5+0.5*\shift)};
\draw [triangle 45-]{(-2,\shift+1) -- ++(down:0.5+0.5*\shift)};


%circuit
\draw (down contact 1) -- (down contact 2) -- (down contact 3) ;

\draw (down contact 1) -- ++(left:\shift)
                       to [current source={info={$I_{inj_1}$}}] ++(up:\shift)
                       -- (up contact 1)
                       to [capacitor={info'={$C_{m_1}$}}] (down contact 1);
%clockwise Em
\draw (up contact 1) -- (up contact 2)
                     to [ resistor = {info' = {$R_{m_1}$}, near start},
                     battery={info'={$E_{m_1}$}, near end}] (down contact 2)
                     -- (down contact 1);
%counterclockwise Ek
\draw (down contact 2) -- (down contact 3)
                       to [battery={info'={$E_{K}$}, rotate={180},near start},
                       resistor = {info = {$g_{K}$}, adjustable', near end}] (up contact 3) 
                       -- (up contact 2);
%counterclockwise ENa
\draw (down contact 3) -- (down contact 4)
                       to [  battery={info={$E_{Na}$}, near start},
                       resistor = {info = {$g_{Na}$}, adjustable', near end}] ++(up:\shift) 
                       -- (up contact 3);


%ground
\draw (ground contact) -- ++(up:1) -- ++ (right:1)
to [ground={pos=1}] ++(down:0.5);
%\end{scope}

%Ra
\draw (down contact 4) to [resistor={info={$Ra_1/2$}}](down contact 5);

\end{tikzpicture}
\end{document}